dynojet upgrade/cobra 4 stroke exhaust
Posted: Thu Oct 05, 2000 5:53 am
It is actually a piece of junk, I don't know what the Supertrapp is
like so I can't give you a comparison there. The Cobra 4 Stroke has
some major design flaws - the housing is aluminum, the collector
inside is made of steel and is pressed in. This alone creates two
problems - dissimilar metal corrosion and heat expansion differences.
What happens is that the steel doesn't expand/contract as much as the
aluminum and the aluminum ends up being streched and will allow the
collector to rattle around. This will eventually beat the aluminum
until it splits in two. In addition the only thing holding the guts
tight is the snap ring outside and a spring inside. (My other bitch)
I know I've had two of them one bought and one factory replacement.
I have E-mailed them with my concerns and disgust and so far received
no reply. Not to side with Elden Carl, but as far as I'm concerned
stick with stock. He's right on this subject.
Steve "Swede" Swedhin.